Idle Air Control Motor Sense Circuit High *

Note: This is a professional automotive technician's resource.

Vehicle Owners: If you are seeking an automotive repair professional to service your vehicle, visit the iATN Repair Shop Finder.

Trouble Ticket Help Requests for DTC P0509

Help Request

Posted

2001 Saturn SC2 1.9L Poor Idle Quality, Stall, MIL Lamp onVIN: 1G8ZY12761P0509: IAC Valve Circuit High Input. This is a frustrating one. A few weeks ago the customer
asked me to come to his house to get his car started. He
had changed the EGR valve, EVAP purge valve, and Coolant
Temp. Sensor. I cleaned the fouled plugs and got it
started. It still didn't idle, but he ...